+AM_VERSION=$($AUTOMAKE --version | head -n 1 | sed -e 's/.* //g')
+ifs=$IFS; IFS="."; set $AM_VERSION; IFS=$ifs
+AM_MAJOR="$1"; AM_MINOR="$2"
+echo "Detected automake $AM_VERSION ..."
+
+AM_MAKEFILES="src/ipaddr/Makefile.ng src/ngircd/Makefile.ng src/testsuite/Makefile.ng src/tool/Makefile.ng"
+
+# De-ANSI-fication?
+if [ "$AM_MAJOR" -eq "1" ] && [ "$AM_MINOR" -lt "12" ]; then
+ # automake < 1.12 => automatic de-ANSI-fication support available
+ echo " - Enabling de-ANSI-fication support."
+ sed -e "s|^__ng_PROTOTYPES__|AM_C_PROTOTYPES|g" configure.ng >configure.ac
+ DEANSI_START=""
+ DEANSI_END=""
+else
+ # automake >= 1.12 => no de-ANSI-fication support available
+ echo " - Disabling de-ANSI-fication support."
+ sed -e "s|^__ng_PROTOTYPES__|AC_C_PROTOTYPES|g" configure.ng >configure.ac
+ DEANSI_START="#"
+ DEANSI_END=" (disabled by ./autogen.sh script)"
+fi
+# Serial test harness?
+if [ "$AM_MAJOR" -eq "1" ] && [ "$AM_MINOR" -ge "13" ]; then
+ # automake >= 1.13 => enforce "serial test harness"
+ echo " - Enforcing serial test harness."
+ SERIAL_TESTS="serial-tests"
+else
+ # automake < 1.13 => no new test harness, nothing to do
+ # shellcheck disable=SC2034
+ SERIAL_TEST=""
+fi
+
+sed -e "s|^__ng_Makefile_am_template__|AUTOMAKE_OPTIONS = ${SERIAL_TESTS} ${DEANSI_START}ansi2knr${DEANSI_END}|g" \
+ src/portab/Makefile.ng >src/portab/Makefile.am
+for makefile_ng in $AM_MAKEFILES; do
+ makefile_am=$(echo "$makefile_ng" | sed -e "s|\.ng\$|\.am|g")
+ sed -e "s|^__ng_Makefile_am_template__|AUTOMAKE_OPTIONS = ${SERIAL_TESTS} ${DEANSI_START}../portab/ansi2knr${DEANSI_END}|g" \
+ $makefile_ng >$makefile_am
+done
+